[linux-block.git] / drivers / s390 / sysinfo.c

/*
 *  drivers/s390/sysinfo.c
 *
 *  Copyright IBM Corp. 2001, 2008
 *  Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com)
 *	       Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <asm/ebcdic.h>
#include <asm/sysinfo.h>
#include <asm/cpcmd.h>

/* Sigh, math-emu. Don't ask. */
#include <asm/sfp-util.h>
#include <math-emu/soft-fp.h>
#include <math-emu/single.h>

static inline int stsi_0(void)
{
	int rc = stsi (NULL, 0, 0, 0);
	return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
}

static int stsi_1_1_1(struct sysinfo_1_1_1 *info, char *page, int len)
{
	if (stsi(info, 1, 1, 1) == -ENOSYS)
		return len;

	EBCASC(info->manufacturer, sizeof(info->manufacturer));
	EBCASC(info->type, sizeof(info->type));
	EBCASC(info->model, sizeof(info->model));
	EBCASC(info->sequence, sizeof(info->sequence));
	EBCASC(info->plant, sizeof(info->plant));
	EBCASC(info->model_capacity, sizeof(info->model_capacity));
	EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
	EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
	len += sprintf(page + len, "Manufacturer:         %-16.16s\n",
		       info->manufacturer);
	len += sprintf(page + len, "Type:                 %-4.4s\n",
		       info->type);
	if (info->model[0] != '\0')
		/*
		 * Sigh: the model field has been renamed with System z9
		 * to model_capacity and a new model field has been added
		 * after the plant field. To avoid confusing older programs
		 * the "Model:" prints "model_capacity model" or just
		 * "model_capacity" if the model string is empty .
		 */
		len += sprintf(page + len,
			       "Model:                %-16.16s %-16.16s\n",
			       info->model_capacity, info->model);
	else
		len += sprintf(page + len, "Model:                %-16.16s\n",
			       info->model_capacity);
	len += sprintf(page + len, "Sequence Code:        %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant:                %-4.4s\n",
		       info->plant);
	len += sprintf(page + len, "Model Capacity:       %-16.16s %08u\n",
		       info->model_capacity, *(u32 *) info->model_cap_rating);
	if (info->model_perm_cap[0] != '\0')
		len += sprintf(page + len,
			       "Model Perm. Capacity: %-16.16s %08u\n",
			       info->model_perm_cap,
			       *(u32 *) info->model_perm_cap_rating);
	if (info->model_temp_cap[0] != '\0')
		len += sprintf(page + len,
			       "Model Temp. Capacity: %-16.16s %08u\n",
			       info->model_temp_cap,
			       *(u32 *) info->model_temp_cap_rating);
	return len;
}

#if 0 /* Currently unused */
static int stsi_1_2_1(struct sysinfo_1_2_1 *info, char *page, int len)
{
	if (stsi(info, 1, 2, 1) == -ENOSYS)
		return len;

	len += sprintf(page + len, "\n");
	EBCASC(info->sequence, sizeof(info->sequence));
	EBCASC(info->plant, sizeof(info->plant));
	len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant of CPU:         %-16.16s\n",
		       info->plant);
	return len;
}
#endif

static int stsi_1_2_2(struct sysinfo_1_2_2 *info, char *page, int len)
{
	struct sysinfo_1_2_2_extension *ext;
	int i;

	if (stsi(info, 1, 2, 2) == -ENOSYS)
		return len;
	ext = (struct sysinfo_1_2_2_extension *)
		((unsigned long) info + info->acc_offset);

	len += sprintf(page + len, "\n");
	len += sprintf(page + len, "CPUs Total:           %d\n",
		       info->cpus_total);
	len += sprintf(page + len, "CPUs Configured:      %d\n",
		       info->cpus_configured);
	len += sprintf(page + len, "CPUs Standby:         %d\n",
		       info->cpus_standby);
	len += sprintf(page + len, "CPUs Reserved:        %d\n",
		       info->cpus_reserved);

	if (info->format == 1) {
		/*
		 * Sigh 2. According to the specification the alternate
		 * capability field is a 32 bit floating point number
		 * if the higher order 8 bits are not zero. Printing
		 * a floating point number in the kernel is a no-no,
		 * always print the number as 32 bit unsigned integer.
		 * The user-space needs to know about the strange
		 * encoding of the alternate cpu capability.
		 */
		len += sprintf(page + len, "Capability:           %u %u\n",
			       info->capability, ext->alt_capability);
		for (i = 2; i <= info->cpus_total; i++)
			len += sprintf(page + len,
				       "Adjustment %02d-way:    %u %u\n",
				       i, info->adjustment[i-2],
				       ext->alt_adjustment[i-2]);

	} else {
		len += sprintf(page + len, "Capability:           %u\n",
			       info->capability);
		for (i = 2; i <= info->cpus_total; i++)
			len += sprintf(page + len,
				       "Adjustment %02d-way:    %u\n",
				       i, info->adjustment[i-2]);
	}

	if (info->secondary_capability != 0)
		len += sprintf(page + len, "Secondary Capability: %d\n",
			       info->secondary_capability);

	return len;
}

#if 0 /* Currently unused */
static int stsi_2_2_1(struct sysinfo_2_2_1 *info, char *page, int len)
{
	if (stsi(info, 2, 2, 1) == -ENOSYS)
		return len;

	len += sprintf(page + len, "\n");
	EBCASC (info->sequence, sizeof(info->sequence));
	EBCASC (info->plant, sizeof(info->plant));
	len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n",
		       info->sequence);
	len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n",
		       info->plant);
	return len;
}
#endif

static int stsi_2_2_2(struct sysinfo_2_2_2 *info, char *page, int len)
{
	if (stsi(info, 2, 2, 2) == -ENOSYS)
		return len;

	EBCASC (info->name, sizeof(info->name));

	len += sprintf(page + len, "\n");
	len += sprintf(page + len, "LPAR Number:          %d\n",
		       info->lpar_number);

	len += sprintf(page + len, "LPAR Characteristics: ");
	if (info->characteristics & LPAR_CHAR_DEDICATED)
		len += sprintf(page + len, "Dedicated ");
	if (info->characteristics & LPAR_CHAR_SHARED)
		len += sprintf(page + len, "Shared ");
	if (info->characteristics & LPAR_CHAR_LIMITED)
		len += sprintf(page + len, "Limited ");
	len += sprintf(page + len, "\n");

	len += sprintf(page + len, "LPAR Name:            %-8.8s\n",
		       info->name);

	len += sprintf(page + len, "LPAR Adjustment:      %d\n",
		       info->caf);

	len += sprintf(page + len, "LPAR CPUs Total:      %d\n",
		       info->cpus_total);
	len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
		       info->cpus_configured);
	len += sprintf(page + len, "LPAR CPUs Standby:    %d\n",
		       info->cpus_standby);
	len += sprintf(page + len, "LPAR CPUs Reserved:   %d\n",
		       info->cpus_reserved);
	len += sprintf(page + len, "LPAR CPUs Dedicated:  %d\n",
		       info->cpus_dedicated);
	len += sprintf(page + len, "LPAR CPUs Shared:     %d\n",
		       info->cpus_shared);
	return len;
}

static int stsi_3_2_2(struct sysinfo_3_2_2 *info, char *page, int len)
{
	int i;

	if (stsi(info, 3, 2, 2) == -ENOSYS)
		return len;
	for (i = 0; i < info->count; i++) {
		EBCASC (info->vm[i].name, sizeof(info->vm[i].name));
		EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi));
		len += sprintf(page + len, "\n");
		len += sprintf(page + len, "VM%02d Name:            %-8.8s\n",
			       i, info->vm[i].name);
		len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
			       i, info->vm[i].cpi);

		len += sprintf(page + len, "VM%02d Adjustment:      %d\n",
			       i, info->vm[i].caf);

		len += sprintf(page + len, "VM%02d CPUs Total:      %d\n",
			       i, info->vm[i].cpus_total);
		len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
			       i, info->vm[i].cpus_configured);
		len += sprintf(page + len, "VM%02d CPUs Standby:    %d\n",
			       i, info->vm[i].cpus_standby);
		len += sprintf(page + len, "VM%02d CPUs Reserved:   %d\n",
			       i, info->vm[i].cpus_reserved);
	}
	return len;
}


static int proc_read_sysinfo(char *page, char **start,
                             off_t off, int count,
                             int *eof, void *data)
{
	unsigned long info = get_zeroed_page (GFP_KERNEL);
	int level, len;
	
	if (!info)
		return 0;

	len = 0;
	level = stsi_0();
	if (level >= 1)
		len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);

	if (level >= 1)
		len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);

	if (level >= 2)
		len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);

	if (level >= 3)
		len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);

	free_page (info);
        return len;
}

static __init int create_proc_sysinfo(void)
{
	create_proc_read_entry("sysinfo", 0444, NULL,
			       proc_read_sysinfo, NULL);
	return 0;
}

__initcall(create_proc_sysinfo);

/*
 * Service levels interface.
 */

static DECLARE_RWSEM(service_level_sem);
static LIST_HEAD(service_level_list);

int register_service_level(struct service_level *slr)
{
	struct service_level *ptr;

	down_write(&service_level_sem);
	list_for_each_entry(ptr, &service_level_list, list)
		if (ptr == slr) {
			up_write(&service_level_sem);
			return -EEXIST;
		}
	list_add_tail(&slr->list, &service_level_list);
	up_write(&service_level_sem);
	return 0;
}
EXPORT_SYMBOL(register_service_level);

int unregister_service_level(struct service_level *slr)
{
	struct service_level *ptr, *next;
	int rc = -ENOENT;

	down_write(&service_level_sem);
	list_for_each_entry_safe(ptr, next, &service_level_list, list) {
		if (ptr != slr)
			continue;
		list_del(&ptr->list);
		rc = 0;
		break;
	}
	up_write(&service_level_sem);
	return rc;
}
EXPORT_SYMBOL(unregister_service_level);

static void *service_level_start(struct seq_file *m, loff_t *pos)
{
	down_read(&service_level_sem);
	return seq_list_start(&service_level_list, *pos);
}

static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
{
	return seq_list_next(p, &service_level_list, pos);
}

static void service_level_stop(struct seq_file *m, void *p)
{
	up_read(&service_level_sem);
}

static int service_level_show(struct seq_file *m, void *p)
{
	struct service_level *slr;

	slr = list_entry(p, struct service_level, list);
	slr->seq_print(m, slr);
	return 0;
}

static const struct seq_operations service_level_seq_ops = {
	.start		= service_level_start,
	.next		= service_level_next,
	.stop		= service_level_stop,
	.show		= service_level_show
};

static int service_level_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &service_level_seq_ops);
}

static const struct file_operations service_level_ops = {
	.open		= service_level_open,
	.read		= seq_read,
	.llseek 	= seq_lseek,
	.release	= seq_release
};

static void service_level_vm_print(struct seq_file *m,
				   struct service_level *slr)
{
	char *query_buffer, *str;

	query_buffer = kmalloc(1024, GFP_KERNEL | GFP_DMA);
	if (!query_buffer)
		return;
	cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
	str = strchr(query_buffer, '\n');
	if (str)
		*str = 0;
	seq_printf(m, "VM: %s\n", query_buffer);
	kfree(query_buffer);
}

static struct service_level service_level_vm = {
	.seq_print = service_level_vm_print
};

static __init int create_proc_service_level(void)
{
	proc_create("service_levels", 0, NULL, &service_level_ops);
	if (MACHINE_IS_VM)
		register_service_level(&service_level_vm);
	return 0;
}

subsys_initcall(create_proc_service_level);

/*
 * Bogomips calculation based on cpu capability.
 */

int get_cpu_capability(unsigned int *capability)
{
	struct sysinfo_1_2_2 *info;
	int rc;

	info = (void *) get_zeroed_page(GFP_KERNEL);
	if (!info)
		return -ENOMEM;
	rc = stsi(info, 1, 2, 2);
	if (rc == -ENOSYS)
		goto out;
	rc = 0;
	*capability = info->capability;
out:
	free_page((unsigned long) info);
	return rc;
}

/*
 * CPU capability might have changed. Therefore recalculate loops_per_jiffy.
 */
void s390_adjust_jiffies(void)
{
	struct sysinfo_1_2_2 *info;
	const unsigned int fmil = 0x4b189680;	/* 1e7 as 32-bit float. */
	FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
	FP_DECL_EX;
	unsigned int capability;

	info = (void *) get_zeroed_page(GFP_KERNEL);
	if (!info)
		return;

	if (stsi(info, 1, 2, 2) != -ENOSYS) {
		/*
		 * Major sigh. The cpu capability encoding is "special".
		 * If the first 9 bits of info->capability are 0 then it
		 * is a 32 bit unsigned integer in the range 0 .. 2^23.
		 * If the first 9 bits are != 0 then it is a 32 bit float.
		 * In addition a lower value indicates a proportionally
		 * higher cpu capacity. Bogomips are the other way round.
		 * To get to a halfway suitable number we divide 1e7
		 * by the cpu capability number. Yes, that means a floating
		 * point division .. math-emu here we come :-)
		 */
		FP_UNPACK_SP(SA, &fmil);
		if ((info->capability >> 23) == 0)
			FP_FROM_INT_S(SB, info->capability, 32, int);
		else
			FP_UNPACK_SP(SB, &info->capability);
		FP_DIV_S(SR, SA, SB);
		FP_TO_INT_S(capability, SR, 32, 0);
	} else
		/*
		 * Really old machine without stsi block for basic
		 * cpu information. Report 42.0 bogomips.
		 */
		capability = 42;
	loops_per_jiffy = capability * (500000/HZ);
	free_page((unsigned long) info);
}

/*
 * calibrate the delay loop
 */
void __cpuinit calibrate_delay(void)
{
	s390_adjust_jiffies();
	/* Print the good old Bogomips line .. */
	printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
	       "%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
	       (loops_per_jiffy/(5000/HZ)) % 100);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/s390/sysinfo.c
	3	*
6bcac508 MS	4	* Copyright IBM Corp. 2001, 2008
	5	* Author(s): Ulrich Weigand (Ulrich.Weigand@de.ibm.com)
	6	* Martin Schwidefsky <schwidefsky@de.ibm.com>
1da177e4 LT	7	*/
1da177e4 LT	8
1da177e4 LT	9	#include <linux/kernel.h>
	10	#include <linux/mm.h>
	11	#include <linux/proc_fs.h>
6bcac508	12	#include <linux/seq_file.h>
1da177e4	13	#include <linux/init.h>
31ee4b2f	14	#include <linux/delay.h>
6bcac508	15	#include <linux/module.h>
1da177e4	16	#include <asm/ebcdic.h>
aa24f7f0	17	#include <asm/sysinfo.h>
6bcac508	18	#include <asm/cpcmd.h>
1da177e4	19
31ee4b2f MS	20	/* Sigh, math-emu. Don't ask. */
	21	#include <asm/sfp-util.h>
	22	#include <math-emu/soft-fp.h>
	23	#include <math-emu/single.h>
	24
0fee644a	25	static inline int stsi_0(void)
1da177e4 LT	26	{
1da177e4 LT	27	int rc = stsi (NULL, 0, 0, 0);
0fee644a	28	return rc == -ENOSYS ? rc : (((unsigned int) rc) >> 28);
1da177e4 LT	29	}
1da177e4 LT	30
0fee644a	31	static int stsi_1_1_1(struct sysinfo_1_1_1 info, char page, int len)
1da177e4	32	{
0fee644a MS	33	if (stsi(info, 1, 1, 1) == -ENOSYS)
	34	return len;
	35
	36	EBCASC(info->manufacturer, sizeof(info->manufacturer));
	37	EBCASC(info->type, sizeof(info->type));
	38	EBCASC(info->model, sizeof(info->model));
	39	EBCASC(info->sequence, sizeof(info->sequence));
	40	EBCASC(info->plant, sizeof(info->plant));
	41	EBCASC(info->model_capacity, sizeof(info->model_capacity));
cbce70e6 MS	42	EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
cbce70e6 MS	43	EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
0fee644a MS	44	len += sprintf(page + len, "Manufacturer: %-16.16s\n",
	45	info->manufacturer);
	46	len += sprintf(page + len, "Type: %-4.4s\n",
	47	info->type);
	48	if (info->model[0] != '\0')
	49	/*
	50	* Sigh: the model field has been renamed with System z9
	51	* to model_capacity and a new model field has been added
	52	* after the plant field. To avoid confusing older programs
	53	* the "Model:" prints "model_capacity model" or just
	54	* "model_capacity" if the model string is empty .
	55	*/
	56	len += sprintf(page + len,
	57	"Model: %-16.16s %-16.16s\n",
	58	info->model_capacity, info->model);
	59	else
	60	len += sprintf(page + len, "Model: %-16.16s\n",
	61	info->model_capacity);
	62	len += sprintf(page + len, "Sequence Code: %-16.16s\n",
	63	info->sequence);
	64	len += sprintf(page + len, "Plant: %-4.4s\n",
	65	info->plant);
cbce70e6 MS	66	len += sprintf(page + len, "Model Capacity: %-16.16s %08u\n",
	67	info->model_capacity, (u32 ) info->model_cap_rating);
	68	if (info->model_perm_cap[0] != '\0')
	69	len += sprintf(page + len,
	70	"Model Perm. Capacity: %-16.16s %08u\n",
	71	info->model_perm_cap,
	72	(u32 ) info->model_perm_cap_rating);
	73	if (info->model_temp_cap[0] != '\0')
	74	len += sprintf(page + len,
	75	"Model Temp. Capacity: %-16.16s %08u\n",
	76	info->model_temp_cap,
	77	(u32 ) info->model_temp_cap_rating);
0fee644a	78	return len;
1da177e4 LT	79	}
1da177e4 LT	80
0fee644a MS	81	#if 0 /* Currently unused */
0fee644a MS	82	static int stsi_1_2_1(struct sysinfo_1_2_1 info, char page, int len)
1da177e4	83	{
0fee644a MS	84	if (stsi(info, 1, 2, 1) == -ENOSYS)
	85	return len;
	86
	87	len += sprintf(page + len, "\n");
	88	EBCASC(info->sequence, sizeof(info->sequence));
	89	EBCASC(info->plant, sizeof(info->plant));
	90	len += sprintf(page + len, "Sequence Code of CPU: %-16.16s\n",
	91	info->sequence);
	92	len += sprintf(page + len, "Plant of CPU: %-16.16s\n",
	93	info->plant);
	94	return len;
1da177e4	95	}
0fee644a	96	#endif
1da177e4	97
0fee644a	98	static int stsi_1_2_2(struct sysinfo_1_2_2 info, char page, int len)
1da177e4	99	{
0fee644a MS	100	struct sysinfo_1_2_2_extension *ext;
	101	int i;
	102
	103	if (stsi(info, 1, 2, 2) == -ENOSYS)
	104	return len;
	105	ext = (struct sysinfo_1_2_2_extension *)
	106	((unsigned long) info + info->acc_offset);
	107
	108	len += sprintf(page + len, "\n");
	109	len += sprintf(page + len, "CPUs Total: %d\n",
	110	info->cpus_total);
	111	len += sprintf(page + len, "CPUs Configured: %d\n",
	112	info->cpus_configured);
	113	len += sprintf(page + len, "CPUs Standby: %d\n",
	114	info->cpus_standby);
	115	len += sprintf(page + len, "CPUs Reserved: %d\n",
	116	info->cpus_reserved);
	117
	118	if (info->format == 1) {
	119	/*
	120	* Sigh 2. According to the specification the alternate
	121	* capability field is a 32 bit floating point number
	122	* if the higher order 8 bits are not zero. Printing
	123	* a floating point number in the kernel is a no-no,
	124	* always print the number as 32 bit unsigned integer.
31ee4b2f	125	* The user-space needs to know about the strange
0fee644a MS	126	* encoding of the alternate cpu capability.
	127	*/
	128	len += sprintf(page + len, "Capability: %u %u\n",
	129	info->capability, ext->alt_capability);
	130	for (i = 2; i <= info->cpus_total; i++)
	131	len += sprintf(page + len,
	132	"Adjustment %02d-way: %u %u\n",
	133	i, info->adjustment[i-2],
	134	ext->alt_adjustment[i-2]);
	135
	136	} else {
	137	len += sprintf(page + len, "Capability: %u\n",
	138	info->capability);
	139	for (i = 2; i <= info->cpus_total; i++)
	140	len += sprintf(page + len,
	141	"Adjustment %02d-way: %u\n",
	142	i, info->adjustment[i-2]);
	143	}
	144
	145	if (info->secondary_capability != 0)
	146	len += sprintf(page + len, "Secondary Capability: %d\n",
	147	info->secondary_capability);
	148
	149	return len;
1da177e4 LT	150	}
1da177e4 LT	151
0fee644a MS	152	#if 0 /* Currently unused */
0fee644a MS	153	static int stsi_2_2_1(struct sysinfo_2_2_1 info, char page, int len)
1da177e4	154	{
0fee644a MS	155	if (stsi(info, 2, 2, 1) == -ENOSYS)
	156	return len;
	157
	158	len += sprintf(page + len, "\n");
	159	EBCASC (info->sequence, sizeof(info->sequence));
	160	EBCASC (info->plant, sizeof(info->plant));
	161	len += sprintf(page + len, "Sequence Code of logical CPU: %-16.16s\n",
	162	info->sequence);
	163	len += sprintf(page + len, "Plant of logical CPU: %-16.16s\n",
	164	info->plant);
	165	return len;
1da177e4	166	}
0fee644a	167	#endif
1da177e4	168
0fee644a	169	static int stsi_2_2_2(struct sysinfo_2_2_2 info, char page, int len)
1da177e4	170	{
0fee644a MS	171	if (stsi(info, 2, 2, 2) == -ENOSYS)
	172	return len;
	173
	174	EBCASC (info->name, sizeof(info->name));
	175
	176	len += sprintf(page + len, "\n");
	177	len += sprintf(page + len, "LPAR Number: %d\n",
	178	info->lpar_number);
	179
	180	len += sprintf(page + len, "LPAR Characteristics: ");
	181	if (info->characteristics & LPAR_CHAR_DEDICATED)
	182	len += sprintf(page + len, "Dedicated ");
	183	if (info->characteristics & LPAR_CHAR_SHARED)
	184	len += sprintf(page + len, "Shared ");
	185	if (info->characteristics & LPAR_CHAR_LIMITED)
	186	len += sprintf(page + len, "Limited ");
	187	len += sprintf(page + len, "\n");
	188
	189	len += sprintf(page + len, "LPAR Name: %-8.8s\n",
	190	info->name);
	191
	192	len += sprintf(page + len, "LPAR Adjustment: %d\n",
	193	info->caf);
	194
	195	len += sprintf(page + len, "LPAR CPUs Total: %d\n",
	196	info->cpus_total);
	197	len += sprintf(page + len, "LPAR CPUs Configured: %d\n",
	198	info->cpus_configured);
	199	len += sprintf(page + len, "LPAR CPUs Standby: %d\n",
	200	info->cpus_standby);
	201	len += sprintf(page + len, "LPAR CPUs Reserved: %d\n",
	202	info->cpus_reserved);
	203	len += sprintf(page + len, "LPAR CPUs Dedicated: %d\n",
	204	info->cpus_dedicated);
	205	len += sprintf(page + len, "LPAR CPUs Shared: %d\n",
	206	info->cpus_shared);
	207	return len;
1da177e4 LT	208	}
1da177e4 LT	209
0fee644a	210	static int stsi_3_2_2(struct sysinfo_3_2_2 info, char page, int len)
1da177e4	211	{
0fee644a MS	212	int i;
	213
	214	if (stsi(info, 3, 2, 2) == -ENOSYS)
	215	return len;
	216	for (i = 0; i < info->count; i++) {
	217	EBCASC (info->vm[i].name, sizeof(info->vm[i].name));
	218	EBCASC (info->vm[i].cpi, sizeof(info->vm[i].cpi));
	219	len += sprintf(page + len, "\n");
	220	len += sprintf(page + len, "VM%02d Name: %-8.8s\n",
	221	i, info->vm[i].name);
	222	len += sprintf(page + len, "VM%02d Control Program: %-16.16s\n",
	223	i, info->vm[i].cpi);
	224
	225	len += sprintf(page + len, "VM%02d Adjustment: %d\n",
	226	i, info->vm[i].caf);
	227
	228	len += sprintf(page + len, "VM%02d CPUs Total: %d\n",
	229	i, info->vm[i].cpus_total);
	230	len += sprintf(page + len, "VM%02d CPUs Configured: %d\n",
	231	i, info->vm[i].cpus_configured);
	232	len += sprintf(page + len, "VM%02d CPUs Standby: %d\n",
	233	i, info->vm[i].cpus_standby);
	234	len += sprintf(page + len, "VM%02d CPUs Reserved: %d\n",
	235	i, info->vm[i].cpus_reserved);
1da177e4	236	}
0fee644a	237	return len;
1da177e4 LT	238	}
	239
	240
	241	static int proc_read_sysinfo(char page, char *start,
	242	off_t off, int count,
	243	int eof, void data)
	244	{
0fee644a MS	245	unsigned long info = get_zeroed_page (GFP_KERNEL);
0fee644a MS	246	int level, len;
1da177e4 LT	247
	248	if (!info)
	249	return 0;
	250
0fee644a MS	251	len = 0;
	252	level = stsi_0();
	253	if (level >= 1)
	254	len = stsi_1_1_1((struct sysinfo_1_1_1 *) info, page, len);
1da177e4	255
0fee644a MS	256	if (level >= 1)
0fee644a MS	257	len = stsi_1_2_2((struct sysinfo_1_2_2 *) info, page, len);
1da177e4	258
0fee644a MS	259	if (level >= 2)
0fee644a MS	260	len = stsi_2_2_2((struct sysinfo_2_2_2 *) info, page, len);
1da177e4	261
0fee644a MS	262	if (level >= 3)
0fee644a MS	263	len = stsi_3_2_2((struct sysinfo_3_2_2 *) info, page, len);
1da177e4	264
0fee644a	265	free_page (info);
1da177e4 LT	266	return len;
	267	}
	268
	269	static __init int create_proc_sysinfo(void)
	270	{
0fee644a MS	271	create_proc_read_entry("sysinfo", 0444, NULL,
0fee644a MS	272	proc_read_sysinfo, NULL);
1da177e4 LT	273	return 0;
	274	}
	275
	276	__initcall(create_proc_sysinfo);
	277
6bcac508 MS	278	/*
	279	* Service levels interface.
	280	*/
	281
	282	static DECLARE_RWSEM(service_level_sem);
	283	static LIST_HEAD(service_level_list);
	284
	285	int register_service_level(struct service_level *slr)
	286	{
	287	struct service_level *ptr;
	288
	289	down_write(&service_level_sem);
	290	list_for_each_entry(ptr, &service_level_list, list)
	291	if (ptr == slr) {
	292	up_write(&service_level_sem);
	293	return -EEXIST;
	294	}
	295	list_add_tail(&slr->list, &service_level_list);
	296	up_write(&service_level_sem);
	297	return 0;
	298	}
	299	EXPORT_SYMBOL(register_service_level);
	300
	301	int unregister_service_level(struct service_level *slr)
	302	{
	303	struct service_level ptr, next;
	304	int rc = -ENOENT;
	305
	306	down_write(&service_level_sem);
	307	list_for_each_entry_safe(ptr, next, &service_level_list, list) {
	308	if (ptr != slr)
	309	continue;
	310	list_del(&ptr->list);
	311	rc = 0;
	312	break;
	313	}
	314	up_write(&service_level_sem);
	315	return rc;
	316	}
	317	EXPORT_SYMBOL(unregister_service_level);
	318
	319	static void service_level_start(struct seq_file m, loff_t *pos)
	320	{
	321	down_read(&service_level_sem);
	322	return seq_list_start(&service_level_list, *pos);
	323	}
	324
	325	static void service_level_next(struct seq_file m, void p, loff_t pos)
	326	{
	327	return seq_list_next(p, &service_level_list, pos);
	328	}
	329
	330	static void service_level_stop(struct seq_file m, void p)
	331	{
	332	up_read(&service_level_sem);
	333	}
	334
	335	static int service_level_show(struct seq_file m, void p)
	336	{
	337	struct service_level *slr;
	338
	339	slr = list_entry(p, struct service_level, list);
	340	slr->seq_print(m, slr);
	341	return 0;
342	}
343
344	static const struct seq_operations service_level_seq_ops = {
345	.start = service_level_start,
346	.next = service_level_next,
347	.stop = service_level_stop,
348	.show = service_level_show
349	};
350
351	static int service_level_open(struct inode inode, struct file file)
352	{
353	return seq_open(file, &service_level_seq_ops);
354	}
355
356	static const struct file_operations service_level_ops = {
357	.open = service_level_open,
358	.read = seq_read,
359	.llseek = seq_lseek,
360	.release = seq_release
361	};
362
363	static void service_level_vm_print(struct seq_file *m,
364	struct service_level *slr)
365	{
366	char query_buffer, str;
367
368	query_buffer = kmalloc(1024, GFP_KERNEL \| GFP_DMA);
369	if (!query_buffer)
370	return;
371	cpcmd("QUERY CPLEVEL", query_buffer, 1024, NULL);
372	str = strchr(query_buffer, '\n');
373	if (str)
374	*str = 0;
375	seq_printf(m, "VM: %s\n", query_buffer);
376	kfree(query_buffer);
377	}
378
379	static struct service_level service_level_vm = {
380	.seq_print = service_level_vm_print
381	};
382
383	static __init int create_proc_service_level(void)
384	{
385	proc_create("service_levels", 0, NULL, &service_level_ops);
386	if (MACHINE_IS_VM)
387	register_service_level(&service_level_vm);
388	return 0;
389	}
390
391	subsys_initcall(create_proc_service_level);
392
393	/*
394	* Bogomips calculation based on cpu capability.
395	*/
396
2fc2d1e9 HC	397	int get_cpu_capability(unsigned int *capability)
	398	{
	399	struct sysinfo_1_2_2 *info;
	400	int rc;
	401
	402	info = (void *) get_zeroed_page(GFP_KERNEL);
	403	if (!info)
	404	return -ENOMEM;
	405	rc = stsi(info, 1, 2, 2);
	406	if (rc == -ENOSYS)
	407	goto out;
	408	rc = 0;
	409	*capability = info->capability;
	410	out:
	411	free_page((unsigned long) info);
	412	return rc;
	413	}
	414
31ee4b2f MS	415	/*
	416	* CPU capability might have changed. Therefore recalculate loops_per_jiffy.
	417	*/
	418	void s390_adjust_jiffies(void)
	419	{
	420	struct sysinfo_1_2_2 *info;
	421	const unsigned int fmil = 0x4b189680; /* 1e7 as 32-bit float. */
	422	FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
	423	FP_DECL_EX;
	424	unsigned int capability;
	425
	426	info = (void *) get_zeroed_page(GFP_KERNEL);
	427	if (!info)
	428	return;
	429
	430	if (stsi(info, 1, 2, 2) != -ENOSYS) {
	431	/*
	432	* Major sigh. The cpu capability encoding is "special".
	433	* If the first 9 bits of info->capability are 0 then it
	434	* is a 32 bit unsigned integer in the range 0 .. 2^23.
	435	* If the first 9 bits are != 0 then it is a 32 bit float.
	436	* In addition a lower value indicates a proportionally
	437	* higher cpu capacity. Bogomips are the other way round.
	438	* To get to a halfway suitable number we divide 1e7
	439	* by the cpu capability number. Yes, that means a floating
	440	* point division .. math-emu here we come :-)
	441	*/
	442	FP_UNPACK_SP(SA, &fmil);
	443	if ((info->capability >> 23) == 0)
	444	FP_FROM_INT_S(SB, info->capability, 32, int);
	445	else
	446	FP_UNPACK_SP(SB, &info->capability);
	447	FP_DIV_S(SR, SA, SB);
	448	FP_TO_INT_S(capability, SR, 32, 0);
	449	} else
	450	/*
	451	* Really old machine without stsi block for basic
	452	* cpu information. Report 42.0 bogomips.
	453	*/
	454	capability = 42;
	455	loops_per_jiffy = capability * (500000/HZ);
	456	free_page((unsigned long) info);
	457	}
	458
	459	/*
	460	* calibrate the delay loop
	461	*/
6c81c32f	462	void __cpuinit calibrate_delay(void)
31ee4b2f MS	463	{
	464	s390_adjust_jiffies();
	465	/* Print the good old Bogomips line .. */
	466	printk(KERN_DEBUG "Calibrating delay loop (skipped)... "
	467	"%lu.%02lu BogoMIPS preset\n", loops_per_jiffy/(500000/HZ),
	468	(loops_per_jiffy/(5000/HZ)) % 100);
	469	}